William h



(ModeL) W. H. LEWIS.

PLATE HOLDER FOR PHOTOGRAPHIU CAMERAS.

No. 272,717. Patented Feb. 20, 1883.

1 i v, I 71 1 L l INVENTOR: ZayXM BY ATTORNEYS.

(all

UNITED STATES PATENT WILLIAM H. LEWIS, OF BROOKLYN, ASSIGNOR TO E. & H. T. ANTHONY &

00., OF NEW YORK, N. Y.

PLATE-HOLDER FOR PHOTOGRAPHlC CAMERAS.

SPECIFICATION forming part of Letters Patent No. 272,717, dated February 20, 1883.

(Model) To all whom it may concern.-

Be it known that I, WILLIAM H. LEWIS, of Brooklyn, in the county of Kings and State of New York,have invented a new and Improved Plate Holder for Photographic Cameras, of which the following is a full, clear, and exact description.

The object of my invention is to facilitate the inserting and removing of sensitized plates from the plate-holder ofphotographic cameras.

The lIlVQIltlOll'COllSlSis in a photograplcplate holder having one end of its frame made removable in order to facilitate the insertion and removal of the sensitized plates.

The invention also consists in the combination, with the plate-holder, of a locking device, and of springs for moving the plates, and in certain other peculiarities of construction, all of which will be fully set forth herein-alter.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a perspective view of my improved plate-holder, showing one ol the slides withdrawn, and showing the removable framepiece opened and turned down. Fig. 2 is an elevation of the plate-holder, showing the movable end piece turned down and the glass plates and the slides removed. Fig.3 is a perspective View of part of the plate-holder, showing the removable frame-piece closed.

' In general the plate holder is of the usual construction, with the exception of the improvements to be described hereinafter.

I have shown these improvements applied to a double plate holder; but they may he applied equally as well to a single plate holder.

The flame A of the photographic-plate holder has one end, B, made movable, and this movable frame-piece B is hinged to the fixed part of the frame at one end by means of a hinge, L, and at the opposite or swinging end it is provided with a stud. U, which catches in a spring-lock, D, fastened to the frame A, which stud and spring-lock hold and lock the movable frame piece B to the frame A when it is closed or folded against the same. Theinner longitudinal surface of the removable framepiece B is provided with a central longitudinal l groove, a, for receiving the end of the septum E. with two longitudinal side grooves, b b, for receiving the inner ends of the slides K, and between each side groove, 1), and the groove (0 with a longitudinal shoulder, d, for the ends of the sensitized glass plates F. These grooves and shoulders cause the removable frame-piece to fit closely against the ends ofthe septum, the slides, and the plates, thereby excluding the light at the removable end of the plate-holder. The end piece of the frame A, opposite the movable frame-piece B,is provided in its inner longitudinal surface with two longitudinal grooves,ff, in each of which a bo\\ -spring, G, is fastened at the middle, so that the ends of the spring will be free and will press against the ends ofthe glass plates F, which are passed intothe plate holder. The usual plate-springs, H, areattached to theseptum. The spring-loci; l) and the stud O, in order that they may not project above the outer surface of the frame, are located in grooves g and h in the frame A and in the end of the movable frame piece, respectively, and the movable frame-piece B is provided at its end with a finger notch, J, which admits of inserting the tinger to raise the lock 1). To insert sensitized plates the frame piece B is unlocked by raising the lock D, and the frame-piece B is then swung down below the grooves of the frame A, whereby the end of the l'rame A Wlll be opened and the bottom grooves completely exposed, so that the plate F can be inserted and pushed home againstthespringsGr. Theplate-holderisthen closed by swinging hack the frame B, whereby the plates F will be pushed completely into the plate-holder. thereby flattening the spring G, and the frame piece B will be automatically locked by means of the look I) and the stud G. If the plates at e to be removed, the frame-piece B is opened and swung down, as described,and the springs Gr null then act to push the plates F outwardthat is,toward the open end ofthe plate-holder-so that they can be seized very conveniently and withdrawn from the plateholder.

I do not limit or confine myself to the exact form herein shown ofthe several parts, as they may be varied, as desired by the maker, without departing from my invention.

1 am aware that a spring -catch has heretofore been employed in plateholders, and I th refore lay no claim, broadly, to such invention.

Having thus fully described myinvention, I claim as new and desire to secure by Letters Patent- 1. A photographic-plate holder constructed substantially as herein shown and described, with one end of the frame and its end grooves made removable, as and for the purpose set forth.

2. The combination, with the fixed end ofthe frame, and with the removable end thereof, of a spring adapted to yield and allow the photographic plate to be. pressed home to its place when the removable end piece is closed, and to push the plate forward for removal when the removable end is opened, as set forth.

3. The combination, in a plate-holder, with the fixed part A of the frame, of the hinged part B and spring-lock D O, constructed and eraser arranged to operate substantially as described, and for the purpose set lorth.

4. The combination, with the extremity of the fixed frame-piece and the ey tremity oi" the removable frame-piece, of a hinge. L, substantially as herein shown and described, adapted to allow the removable t'rainepiece to turn down below the level of the groove in which the photographic plates move, as set forth.

5. The combination, with a photographicplate holder, of a removable frame-piece having its inner surface grooved, so as to adapt it to tit over the ends of the septum, the photographic plates, and the slides, substantially as herein shown and described, and for the purpose of holding the sensitized plates in place, as set forth.

WILLIAM H. LEWIS.

Witnesses:

EDGAR TATE, DAVID M. BOLDREDGE, 

